The harmful effects of soil pollution may come from direct contact with polluted soil or from contact with other resources, such as water or food which has been grown on or come in direct contact with the polluted soil.
A reason for your arm or hand falling asleep at night could be because of having a stroke. A stroke is a life-threatening emergency that happens when there is a disruption in the flow of blood to your brain. This can cause paralysis, loss of consciousness, numbness on one side of the body, and impaired speech.
Tumors that place pressure on your nerves also can cause your leg to fall asleep. Other potential causes include nerve damage, nutrient deficiency, insect bites, shingles or certain medications. To properly treat your leg falling asleep, talk to your doctor to determine the cause.